I had one too. I guess I did math on it, but I remember much more clearly downloading games to it via the graph link cable. I spent hours playing Tetris in math class.
Yes, the exchange of games and other programs was something that gave fame to this series of calculators. I also remember we had a fake program emulating the reset so we could avoid having our TIs wiped by the exam supervisor. Not proud of it, but I had a few formulas/macros on many exams :-)
NKosmatos|3 years ago